What does this UWSGI error mean? " SIGPIPE: writing to a closed pipe/socket/fd "

Question

There are a few questions related to this issue, but none of them actually help me understand what is going on.

The full error:

 SIGPIPE: writing to a closed pipe/socket/fd (probably the client disconnected) on request 

Answer 1

It simply means that the client, i.e. the sites visitors, closed their connection. Either by closing the browser, or through a connection error on their part.